bowles



( No Model.) 2 Sheets-Sheet 1.

J. BOWLES. I

SAW SET.

. N0. 581,245. Patented Apr. 20. 1897'.

\w/ MI v INVENTOR WITNESSES:

ATTORNEY L (No Model.) v 2 Sheets-Sheet 2'.

J. BOWLES.

SAW SET.

No. 581,245. Patented Apr. 20, 1897.

WITNESSES.

I I f z UNITED; TA'IES FFICE.

:ATENT SAW-SET.

SPECIFICATION forming part of LettersPatent No. 581,245, dated April 20,1897.

Application filed February 26, 1896. 'Serial No. 539,942. (No model.)

To all whom it may concern:

Be it known that I, JOHN BoWLEs, a citizen of the Unit-ed States,residing in the city, county, and State of New York. have invented acertain new and useful Improvement in Saw-Sets; and I do hereby declarethat the following is a full, clear, and exact description of the same.

The special object of my invention is to provide a simple andserviceable saw-set for setting the teeth of self-planing saws, such asexampled in Letters Patent No. 445,239, issued to me January 27, 1891,and Letters Patent No. 503,552, issued August 15, 1893, wherein theforward edges of the saw-teeth are beveled or sharpened and setlaterally beyond the plane of the saw, so as to plane the cut surfacesof the wood in the process of sawing.

To this end I have devised a saw-set combining various novel features ofconstruction and arrangement; and in order that my invention may beclearly ascertained I shall first describe in detail the mode in which Ipractice my invention, and then point out its various features in theclaims.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which the same parts are designated by likeletters in all the figures.

Figure 1 is a side elevation, partly in section, of a saw-set embodyingmy invention. Fig. 2 is a plan view of the same. Fig. 3 represents apart of the same in front elevation preparatory to settinga saw-tooth.Fig. 4 is a perspective View corresponding to Fig. 3. Fig. 5 is a viewsimilar to Fig. 3, but showing the tooth set. Fig. 6 is an edge view ofa self-planing saw having its teeth thus set. Fig. 7 is across-sectional view of part of the said saw. Figs. 8 and 9 are plan andedge views, respectively, of the female die of the said saw-set. Figs.10 and 11 show a modification.

The form of my improved saw-set thus illustrated is particularlydesigned for setting the teeth of aself-planing saw the planing edges ofwhich are straight and extend the full length of the tooth, as shown inFigs. 1, 6, and 7, but my invention is adapted also to teeth havingcurved or partial planing edges, as illustrated in my prior patents,Nos. 445,239 and 503,552, aforesaid.

In the present instance I have formed the female die of the saw-setwith, by preference, two diametrically-crossed grooves BB and B B on theupper and lower faces, respectively, each groove having. an inclinedside 13 and the inclined sides B of the two grooves on each face slopingin opposite directions, and the upper and lower grooves 13 B B Brespectively, being placed opposite each other, theirinclined sidessloping in opposite directions, all as shown.

I make the reversible female die A by preference in the form of acircular plate, and form it with a central aperture A to receive avertical pivot fixed on the bed 0 of the sawset, so that the female diecan be turned on said pivot or reversed thereupon to bring either of thedie-grooves B B B B into correspondence with the male die D.

I fix the male die D by preference on a dieholder E, mounted to slidevertically without turning in a rigid frame F and arranged to bedepressed by a cam-lever G and elevated by a spring H after asubstantially common fashion, and I provide for the adjustment of thedownwardthrow of the male die D by means of a set-screw K arranged as anadj ustable stop on the frame to limit the downward throw of thecam-lever G.

I form the male die D with a transverse groove K, having an inclinedside K to register and cooperate with the inclined side B of the radialend of either of the female-die grooves B B B Biand with a transverseshoulder K parallel with the groove K to register and cooperate With theshoulder B at the upper edge of each inclined side 13. I also bypreference form the male die D with a lesser groove L, for apurposehereinafter described, and I form the die D with a squared shank M, asindicated in dotted lines in Fig. 1, to enter a socket M, formed in thedie-holder E, and arrange in the die-holder E a setscrew N to entereither of the holes N in opposite sides of the shank, so that the die Dcan be reversed in the holder E to register with either of thereversely-inclined grooves in the female die A.

For locking the female die A in position with either of its top orbottom grooves in position to cooperate with the male die I prefer toform bolt-holes O in the circular edge of the female die, correspondingwith the grooves therein, as shown, to receive a bolt 0, mounted onafixed spring 0 In using this form of my saw-set the male and one of thecorresponding female dies are placed in correspondence, as shown in Fig.4, and the saw teeth, the edges of alternate ones of which arepreviously beveled or sharpened on the side opposite to that to whichthey are to be set, are fed between the male and female dies, the firsttooth to be set being placed with its beveled planing edge projectingbeyond the shoulder 13 of the female die and so that its edge will liedirectly beneath and parallel with the lesser groove L in the male dieD. To stop the tooth exactly in the right position for setting, asdescribed, I may pro vide a springgage I, as shown, secured to anddepending from the fixed die -holder guide Q to a position beneath themale die D when elevated, so that it will properly stop the edge of thetooth, as shown, and yet will be forced outward laterally by and out ofthe way of the descending die D, acting as acam. I provide for adjustingthe gage P by means of a set-screw I therein working against thedie-holder guide Q. The groove L has one side running downwardly at aslight divergence from the vertical, as indicated in Fig. 1 and lessclearly in Figs. 3 and 5. This incline or bevel is shown more distinctlyin Figs. 10 and 11, in which that portion of the male die beyond thegroove L which does not operate to set the saw-teeth is shown extendeddownward to a greater degree than in Figs. 1 and 3, so as to form adepending beveled finger R. IV hen the male die descends, the beveledside of the finger will come in contact with the edge of the saw-toothif the latter is out of place, and by reason of the bevel on both thefinger and the tooth the latter will be forced back until it registersexactly with the dies.

The male die being depressed, as shown in Fig. 1, the beveled planingedge of the tooth will be set by and between the inclined sides K and Bof the male and female dies, and the lesser groove L in the male diewill clear and thus protect the sharpened edge.

Alternate teeth being set on the same side can thus all be set withoutreversing the dies, and then the intervening teeth set by reversing thesaw and the dies, as described, the female die A being unbolted andturned on its pivot until its succeeding groove is in position, when itwill be automatically locked by the spring-actuated bolt described. By

thus employing a number of grooves in the female die its durability isprolonged, as its constant shifting will brin g i ts various groovesinto play successively.

In some cases I make the inclined side of the groove in the male dieinclined longitudin ally to the horizontal plane, so that the outer partof the planing edge of each tooth will be set outward slightly more thanthe inner part, and thus marking or grooving of the planed surfaces willbe prevented.

I claim 1. In a saw-set, the combination with a female die having atransverse groove formed with an inclined side, and a bottom parallelwith the face of the die on which the saw is supported, of a male diehaving an inclined face to fit the corresponding side of the female-diegroove and a groove L adjacent to the inclined face, substantially asdescribed.

2. In a saw-set, the combination with a female die having a transversegroove formed with an inclined side and a bottom parallel with the faceof the die on which the saw is supported, of a male die having aninclined face to fit the corresponding side of the female-die groove,and a groove L adjacent to said inclined face, and a stop to bring theedge of the saw-tooth in line with said groove L, substantially asdescribed.

3. The combination, with the frame of the saw-set, and the female diepivoted thereon, having a plurality of radiating grooves with inclinedsides and formed with corresponding bolt-holes, of the male die havingan illclined groove to engage either of said femaledie grooves, and apin to engage either of said bolt-holes and secure the correspondingfemale-die groove in register with the male-die groove.

4:. The combination with the female die formed with a plurality ofgrooves having their sides inclined in opposite directions, of amale-die holder, a male die having an inclined face to engage either ofsaid femaledie grooves, and means for reversing and locking said maledie in the die-holder to suit either of the oppositely-inclinedfemale-die grooves.

5. In a saw-set, a male die having a dependin g finger provid ed with abeveled side adapted to come in contact with the edge of the saw-toothwhen the die descends, and operate to force the saw-tooth into properposition to be acted upon by the face of the die, substantially asdescribed.

6. In a saw-set, a pair of dies having inclined faces to bend thesaw-tooth away from the plane of the saw, and other faces adapted tobend back the edge of the saw-tooth to a position parallel with saidplane, substantially as described.

In testimony whereof I have hereunto set my hand this 7th day of April,1894:.

JOHN BOWLES.

In presence of- CLARENCE L. BURGER, FRED C. EWING.

